Roofs |
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Sloped Glazing |
You saw earlier that a curtain wall is just another wall type made out of panels and mullions orga-nized in a grid system. Similarly, sloped glazing is a type of a roof that has glass as material and mullions for divisions. Using sloped glazing, you can make roof lights and shed lights and also use them to design simple framing structures.
To create sloped glazing, make a simple pitch roof and select a sloped glazing type. Once you have done that, start applying grids that will define the panel sizes and apply mullions. Figure 11.42 demonstrates the process of converting a standard roof into sloped glazing. |
Figure 11.42
(A) standard roof, (B) Convert a standard roof into sloped glaz-ing, (c) divide with curtain grid, (D) add mullions to the grid, (E) finished all mul-lions applied to the grid, (F) change curtain panel from glass to empty, (G) finished rafters |
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| Using the knowledge and the principles mentioned, you will be able to create any of the roofs shown in the typology that follows the real world scenario. |
Creating a Ridge Skylight Roof
Suppose we are planning a factory whose roof needs to be a ridge skylight on a pitch.
Here’s how we make this roof:
1. In Level 1, draw the .oor plan of the building. For the simplicity of the exercise, we will assume thatthe .oor plan is a rectangle shape.
2. Define three levels in the drawing, Level 2 being 4m, Level 3 6m.
3. Switch to Level 2 and select the Roof tool.
4. Select Roof By Footprint.
5. Click on the Pick Walls option in the Design bar.
6. Define offset of 1´-6. (50cm), and check Defines Slope.
7. Click Finish Roof in the Design Bar |
After having completed these steps, this is the resulting roof.
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We now need to cut the top of this roof at Level 3.
1. Select the roof, and in its instance properties, select Level 3 under Cutoff Level and –1´8. (–57cm)for Cutoff Offset (the roof thickness value) and Finish Roof. The result will look like this.
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We will now create the second roof and use the opening in the first roof as a reference for the sketch linesdefining the new roof.
1. Switch to Level 3, and select the Roof By Footprint tool. Instead of picking walls, select the Line tool,and in the Options bar, change from the Draw option to Pick. Pick the four edges of the opening ofthe first roof and lock all padlocks that appear when the four pink sketch lines are selected.
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By doing this, you are creating a relationship between the two roofs so that if you later change the cutofflevel or the geometry, the second roof will change to match.
Select the second roof, and from the Type Selector, pick Sloped Glazing to get the following configuration
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If the slope of the second roof isn’t what you desire, you can change it at any time. Select the roof, clickEdit on the Options bar, click on each of the sketch lines, and type in a new value over the slope value dis-played. In this example, we have set 40 degrees for the second roof (the skylight).
Tip: In the Project Units dialog box, the Slope setting defines how the slope of a roof is measured.
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Slope has these possible settings:
Slope Angle The value of the slope is described as an angle.
Rise/1000 If this is the selected option, when you select a roof sketch line to define the slope, you will be putting in the height value between the pitch of the roof and its base (that is, you’ll enter the Height Offset at Head property of a slope arrow). By default, when the project units are set to Impe-rial, the default slope is set to Slope Angle. For metric, it’s Rise/1000. Of course, you can change that to your liking throughout the course of the project.
The last thing to do is to divide the sloped glazing into segments and apply mullions. For that you willuse the Curtain Grid tool and start dividing the glazing.
At the end, add mullions by selecting the Mullion tool and picking the grid lines on the glazing. The finaloutcome should be similar to this.
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